All of our information is sourced from manufacturer data.

Cavityrock- Dual density insulation


Cavityrock- Dual density insulation

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Board Insulation Board Insulation

Mineral Board Mineral Board

Mineral Wool Mineral Wool

Sloped Ceiling Sloped Ceiling

Design Options

Product Description

ROCKWOOL Cavityrock semi-rigid stone wool insulation board available in mono and dual density is designed for exterior cavity wall and rainscreen applications.



Standard Sizes: 1' 4", 2' 0"


Standard Sizes: 4' 0"


Standard Sizes: 1", 1-1/2", 2", 2-1/2", 3", 3-1/2", 4", 5", 5-1/2", 6", 7", 8"

Manufacturer Design Notes

Cavityrock is compatible with numerous cladding attachment systems.

Performance Data

R-Value Per Inch

Measure of the thermal resistance of the product per inch of thickness, imperial units.

°F·ft^2·h / BTU / inch


Fire Resistance

Amount of time the product can withstand fire

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Smoke Development

As defined by the ASTM E84 testing standard

0, 10, 25

Product Density

lbs / ft^3

3.8, 6.2

NRC Value

The Noise Reduction Coefficient values of this product

0.9, 1

Linear Shrinkage

The percent that a product shrinks, usually in response to heat.



Flame Spread

As defined by the ASTM E84 testing standard

0, 10